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      1 Installation Instructions
      2 *************************
      3 
      4 Copyright (C) 1994, 1995, 1996, 1999, 2000, 2001, 2002, 2004, 2005,
      5 2006 Free Software Foundation, Inc.
      6 
      7 This file is free documentation; the Free Software Foundation gives
      8 unlimited permission to copy, distribute and modify it.
      9 
     10 Basic Installation
     11 ==================
     12 
     13 Briefly, the shell commands `./configure; make; make install' should
     14 configure, build, and install this package.  The following
     15 more-detailed instructions are generic; see the `README' file for
     16 instructions specific to this package.
     17 
     18    The `configure' shell script attempts to guess correct values for
     19 various system-dependent variables used during compilation.  It uses
     20 those values to create a `Makefile' in each directory of the package.
     21 It may also create one or more `.h' files containing system-dependent
     22 definitions.  Finally, it creates a shell script `config.status' that
     23 you can run in the future to recreate the current configuration, and a
     24 file `config.log' containing compiler output (useful mainly for
     25 debugging `configure').
     26 
     27    It can also use an optional file (typically called `config.cache'
     28 and enabled with `--cache-file=config.cache' or simply `-C') that saves
     29 the results of its tests to speed up reconfiguring.  Caching is
     30 disabled by default to prevent problems with accidental use of stale
     31 cache files.
     32 
     33    If you need to do unusual things to compile the package, please try
     34 to figure out how `configure' could check whether to do them, and mail
     35 diffs or instructions to the address given in the `README' so they can
     36 be considered for the next release.  If you are using the cache, and at
     37 some point `config.cache' contains results you don't want to keep, you
     38 may remove or edit it.
     39 
     40    The file `configure.ac' (or `configure.in') is used to create
     41 `configure' by a program called `autoconf'.  You need `configure.ac' if
     42 you want to change it or regenerate `configure' using a newer version
     43 of `autoconf'.
     44 
     45 The simplest way to compile this package is:
     46 
     47   1. `cd' to the directory containing the package's source code and type
     48      `./configure' to configure the package for your system.
     49 
     50      Running `configure' might take a while.  While running, it prints
     51      some messages telling which features it is checking for.
     52 
     53   2. Type `make' to compile the package.
     54 
     55   3. Optionally, type `make check' to run any self-tests that come with
     56      the package.
     57 
     58   4. Type `make install' to install the programs and any data files and
     59      documentation.
     60 
     61   5. You can remove the program binaries and object files from the
     62      source code directory by typing `make clean'.  To also remove the
     63      files that `configure' created (so you can compile the package for
     64      a different kind of computer), type `make distclean'.  There is
     65      also a `make maintainer-clean' target, but that is intended mainly
     66      for the package's developers.  If you use it, you may have to get
     67      all sorts of other programs in order to regenerate files that came
     68      with the distribution.
     69 
     70 Compilers and Options
     71 =====================
     72 
     73 Some systems require unusual options for compilation or linking that the
     74 `configure' script does not know about.  Run `./configure --help' for
     75 details on some of the pertinent environment variables.
     76 
     77    You can give `configure' initial values for configuration parameters
     78 by setting variables in the command line or in the environment.  Here
     79 is an example:
     80 
     81      ./configure CC=c99 CFLAGS=-g LIBS=-lposix
     82 
     83    *Note Defining Variables::, for more details.
     84 
     85 Compiling For Multiple Architectures
     86 ====================================
     87 
     88 You can compile the package for more than one kind of computer at the
     89 same time, by placing the object files for each architecture in their
     90 own directory.  To do this, you can use GNU `make'.  `cd' to the
     91 directory where you want the object files and executables to go and run
     92 the `configure' script.  `configure' automatically checks for the
     93 source code in the directory that `configure' is in and in `..'.
     94 
     95    With a non-GNU `make', it is safer to compile the package for one
     96 architecture at a time in the source code directory.  After you have
     97 installed the package for one architecture, use `make distclean' before
     98 reconfiguring for another architecture.
     99 
    100 Installation Names
    101 ==================
    102 
    103 By default, `make install' installs the package's commands under
    104 `/usr/local/bin', include files under `/usr/local/include', etc.  You
    105 can specify an installation prefix other than `/usr/local' by giving
    106 `configure' the option `--prefix=PREFIX'.
    107 
    108    You can specify separate installation prefixes for
    109 architecture-specific files and architecture-independent files.  If you
    110 pass the option `--exec-prefix=PREFIX' to `configure', the package uses
    111 PREFIX as the prefix for installing programs and libraries.
    112 Documentation and other data files still use the regular prefix.
    113 
    114    In addition, if you use an unusual directory layout you can give
    115 options like `--bindir=DIR' to specify different values for particular
    116 kinds of files.  Run `configure --help' for a list of the directories
    117 you can set and what kinds of files go in them.
    118 
    119    If the package supports it, you can cause programs to be installed
    120 with an extra prefix or suffix on their names by giving `configure' the
    121 option `--program-prefix=PREFIX' or `--program-suffix=SUFFIX'.
    122 
    123 Optional Features
    124 =================
    125 
    126 Some packages pay attention to `--enable-FEATURE' options to
    127 `configure', where FEATURE indicates an optional part of the package.
    128 They may also pay attention to `--with-PACKAGE' options, where PACKAGE
    129 is something like `gnu-as' or `x' (for the X Window System).  The
    130 `README' should mention any `--enable-' and `--with-' options that the
    131 package recognizes.
    132 
    133    For packages that use the X Window System, `configure' can usually
    134 find the X include and library files automatically, but if it doesn't,
    135 you can use the `configure' options `--x-includes=DIR' and
    136 `--x-libraries=DIR' to specify their locations.
    137 
    138 Specifying the System Type
    139 ==========================
    140 
    141 There may be some features `configure' cannot figure out automatically,
    142 but needs to determine by the type of machine the package will run on.
    143 Usually, assuming the package is built to be run on the _same_
    144 architectures, `configure' can figure that out, but if it prints a
    145 message saying it cannot guess the machine type, give it the
    146 `--build=TYPE' option.  TYPE can either be a short name for the system
    147 type, such as `sun4', or a canonical name which has the form:
    148 
    149      CPU-COMPANY-SYSTEM
    150 
    151 where SYSTEM can have one of these forms:
    152 
    153      OS KERNEL-OS
    154 
    155    See the file `config.sub' for the possible values of each field.  If
    156 `config.sub' isn't included in this package, then this package doesn't
    157 need to know the machine type.
    158 
    159    If you are _building_ compiler tools for cross-compiling, you should
    160 use the option `--target=TYPE' to select the type of system they will
    161 produce code for.
    162 
    163    If you want to _use_ a cross compiler, that generates code for a
    164 platform different from the build platform, you should specify the
    165 "host" platform (i.e., that on which the generated programs will
    166 eventually be run) with `--host=TYPE'.
    167 
    168 Sharing Defaults
    169 ================
    170 
    171 If you want to set default values for `configure' scripts to share, you
    172 can create a site shell script called `config.site' that gives default
    173 values for variables like `CC', `cache_file', and `prefix'.
    174 `configure' looks for `PREFIX/share/config.site' if it exists, then
    175 `PREFIX/etc/config.site' if it exists.  Or, you can set the
    176 `CONFIG_SITE' environment variable to the location of the site script.
    177 A warning: not all `configure' scripts look for a site script.
    178 
    179 Defining Variables
    180 ==================
    181 
    182 Variables not defined in a site shell script can be set in the
    183 environment passed to `configure'.  However, some packages may run
    184 configure again during the build, and the customized values of these
    185 variables may be lost.  In order to avoid this problem, you should set
    186 them in the `configure' command line, using `VAR=value'.  For example:
    187 
    188      ./configure CC=/usr/local2/bin/gcc
    189 
    190 causes the specified `gcc' to be used as the C compiler (unless it is
    191 overridden in the site shell script).
    192 
    193 Unfortunately, this technique does not work for `CONFIG_SHELL' due to
    194 an Autoconf bug.  Until the bug is fixed you can use this workaround:
    195 
    196      CONFIG_SHELL=/bin/bash /bin/bash ./configure CONFIG_SHELL=/bin/bash
    197 
    198 `configure' Invocation
    199 ======================
    200 
    201 `configure' recognizes the following options to control how it operates.
    202 
    203 `--help'
    204 `-h'
    205      Print a summary of the options to `configure', and exit.
    206 
    207 `--version'
    208 `-V'
    209      Print the version of Autoconf used to generate the `configure'
    210      script, and exit.
    211 
    212 `--cache-file=FILE'
    213      Enable the cache: use and save the results of the tests in FILE,
    214      traditionally `config.cache'.  FILE defaults to `/dev/null' to
    215      disable caching.
    216 
    217 `--config-cache'
    218 `-C'
    219      Alias for `--cache-file=config.cache'.
    220 
    221 `--quiet'
    222 `--silent'
    223 `-q'
    224      Do not print messages saying which checks are being made.  To
    225      suppress all normal output, redirect it to `/dev/null' (any error
    226      messages will still be shown).
    227 
    228 `--srcdir=DIR'
    229      Look for the package's source code in directory DIR.  Usually
    230      `configure' can determine that directory automatically.
    231 
    232 `configure' also accepts some other, not widely useful, options.  Run
    233 `configure --help' for more details.
    234 
    235